Cortical brain regions associated with color processing: an FMRI study

• Autor(es): Bramão, Inês ; Faísca, Luís ; Forkstam, Christian ; Reis, Alexandra ; Petersson, Karl Magnus
• Data: 2010
• Identificador Persistente: http://hdl.handle.net/10400.1/4874
• Origem: Sapientia - Universidade do Algarve
• Assunto(s): FMRI; Color information and processing; Naming; Natural objects; Artifacts objects; Non-objects
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

To clarify whether the neural pathways concerning color processing are the same for natural objects, for artifacts objects and for non-objects we examined brain responses measured with functional magnetic resonance imaging (FMRI) during a covert naming task including the factors color (color vs. black&white (B&W)) and stimulus type (natural vs. artifacts vs. non-objects). Our results indicate that the superior parietal lobule and precuneus (BA 7) bilaterally, the right hippocampus and the right fusifom gyrus (V4) make part of a network responsible for color processing both for natural objects and artifacts, but not for non-objects. When color objects (both natural and artifacts) were contrasted with color non-objects we observed activations in the right parahippocampal gyrus (BA 35/36), the superior parietal lobule (BA 7) bilaterally, the left inferior middle temporal region (BA 20/21) and the inferior and superior frontal regions (BA 10/11/47). These additional activations s uggest that colored objects recruit brain regions that are related to visual semantic information/retrieval and brain regions related to visuo-spatial processing. Overall, the results suggest that color information is an attribute that can improve object recognition (behavioral results) and activate a specific neural network related to visual semantic information that is more extensive than for B&W objects during object recognition